284 JiitiToitr OF Tin-: 



them, knowing how destructive they are to the water fowls found 

 in the sloughs along the river Imttoius. 



They ne>t. in naliiral cavities in trees and on the sides of rocky 

 cliffs. Nest without lining. Kggs three or four, 2.25x1.70; 

 grayish ochre, spotted and blotched with reddish and dark choco- 

 late brown, running somewhat together, thickest about larger 

 end; in form, subspherical to rounded oval. 



SmtOENtrs JESALON K.\rr. 



Two outer quills with inner webs emarginafed near tips; first quill shorter 

 than fourth. Tarsus not decidedly longer tlum middle toe; basal segment of 

 toes covered with small hexagonal or roundish scales. Adult m<i/<x: MlnNi 

 gray ahove, with blackish shaft, streaks; hiiidneck spoiled or mixed with whitish 

 and huffy or ochraceous; quills dusky; tail crossed by a greater or less number 

 of blackish bauds, and lipped \\ilh whitish; lower parts whitish, huffy or light 

 rusty, striped with brownish or dusky. Adult females: Brownish above, the tail 

 u.Mially with a greater or less number of lighter (usually narrow) bands; top of 

 head streaked with blackish, and feathers of back and rump with shaft streaks 

 of the same; lower parts much as in the male, but without rusty tinge. Ydiiiii/ 

 (both sexes'): Much like adult female, but darker, or else much tinged above with 

 ochraceous or rusty. 



Falco columbarius LINN. 



PIGEON HAWK. 

 PLATE XVIII. 



Migratory; rare. Arrive in October; leave, usually, by the 

 first of April. I have a male in the "Goss Ornithological Col- 

 lection" that I shot at Neosho Falls, June 10th, 1878. 



B. 7. R. 417. C. 505. G. 198, 138. U. 357. 



HABITAT. The whole of North America; breeding chiefly 

 north of the United States; south in winter to the West Indies 

 and northern South America. 



SP. CHAH. "Adult male: Above, cinereous, varying in shade, but generally 

 of a slaty bluish cast; each feather with a distinct shaft streak of black, t Inc- 

 lines most conspicuous on the head above. Tail with a very broad subtermiual 

 baud of black, about an inch in width; there are indications of three other 

 bands, their continuity and distinction varying with the individual, but gener- 

 ally quite conspicuous, and each about- half the width of the terminal one: the 

 subierminal black band is succeeded by a terminal one of white, of about Ihree- 

 sixtcenths of an inch in width, sometimes broader; on the lateral feathers the 

 black bands are always conspicuous, being in form of transverse oblong spots, 

 crossing the shaft, but less extended on the outer web, which is often inmiacii- 

 \cept at the end, the broad terminal band always extending to the 



